The Eheim Substrat is a premium bio-filter medium designed to deliver efficient and stable biological filtration in both freshwater and marine aquariums. Made from highly porous sintered glass, it offers an enormous surface area of up to 450 m² per litre, creating the perfect environment for beneficial nitrifying bacteria to thrive. This ensures optimal breakdown of harmful ammonia and nitrite, keeping your aquarium water crystal-clear and safe for aquatic life.

Its irregular granule shape promotes excellent water flow, preventing channeling and allowing maximum bacterial colonization. Trusted by aquarists worldwide, Eheim Substrat is long-lasting, reusable, and compatible with a wide range of filtration systems, including canister filters, sump filters, and wet/dry setups.

Key Features

• Made from high-porosity sintered glass for superior bacterial growth
• Large surface area (450 m²/L) for maximum biological filtration efficiency
• Irregular granule shape improves water flow and reduces clogging
• Effectively converts harmful ammonia and nitrite into less toxic nitrate
• Suitable for both freshwater and marine aquariums
• Reusable after gentle rinsing in aquarium water
• Designed for use in canister, sump, and trickle filters
• Quality engineered in Germany for long-term reliability

Specifications

• Weight: 830g
• Volume: 1L
• Material: Sintered glass granules
• Surface Area: 450 m²/L
• Suitable for: Freshwater & Saltwater tanks

Usage
Place Eheim Substrat in the biological stage of your filtration system after mechanical filtration media. Rinse gently in aquarium water during maintenance to preserve beneficial bacteria. Replace partially every 6–12 months for best performance.